User’s Manual 9
In this area is located a digital display
(called display “MULTIFUNCTION”)
showing the
measurements of various quantities that can be selected through the buttons “F1” and “F2”
and indicated to the operator through the corresponding indicators.
The available quantities are:
“DATA – HOURS COUNT /
START COUNTER”:
by selecting this function the display
“MULTIFUNCTION” normally shows the number of operating hours of the generator set
engine. The hours count doesn’t consider if the users are connected to the generator but
the condition of engine running only. By keeping pressed the bu
tton “MODE / ACK”, you
can view the number of starts of the engine (the number refers to the performed starts,
not to the start attempts). As soon as “MODE / ACK” is released the engine’s operating
hours can be viewed again. The corresponding indicator is turned on when the display
shows the engine’s operating hours, while it flashes when the number of starting attempts
is viewed. If the number of starts of the operating hours exceeds 999, the number is
divided by 10 and displayed with a decimal point on the right digit.
It is possible to program (through the parameter P50) a number of operating hours for the
engine after which maintenance has to be carried out. When the hour-counter reaches or
exceeds such parameter (NB: it is set by tens of hours) in order to signal the maintenance
request the number of operating hours will flash alternatively to the message “SER” (with
the selector on MAN, AUTO and TEST the function to view the operating hours is
automatically selected after 60 seconds without pressing any button). This condition stays
until the hour-counter is reset or until the value of the Parameter P50 is changed (by
increasing it or by forcing it to 0). Both the counters are reset with a common operation
(they cannot be reset separately):
By pressing the “F1” and “F2” select the “DATA – HOURS COUNT /
START
COUNTER”
function
Switch the key selector to OFF_RESET.
Press at the same time “MODE / ACK” and “STOP” for 5 seconds. After 5 seconds
the counters will be reset. The display does not indicate the reset in any way;
therefore the operator has to count the 5 seconds.
There is another hour counter. It cannot be cleared in any way. Its value is not shown on
the DST4600A front panel, but can be read by the serial port.
“GEN-SET FREQUENCY”: when this function is selected, the display
“MULTIFUNCTION” shows the frequency measured on the phase L1 (terminal 63) of the
generator (in Hz with a decimal).
“MAINS VOLTAGE (Vac) / (MAINS VOLT./SIM STATUS) /
REACTIVE POWER (kvar)
”:
when this function is selec
ted, the display “MULTIFUNCTION” shows one of the phase-
to-phase voltages measured by the board, according with the status of the indicators
“L1/L2”, “L2/L3” and “L3/L1” located between the displays “A” and “V”:
-
Indicator
“L1/L2”
turned
on:
phase
R-S
-
Indicator
“L2/L3”
turned
on:
phase
S-T
-
Indicator
“L3/L1”
turned
on:
phase
T-R
If the board is programmed not to use the internal mains sensor, display shows “---“. If
the board is programmed to use the internal mains sensor and the input “MAINS
SIMULATIO
N” (terminal 24) is enabled, the indicator “MAINS VOLTAGE (Vac) /
REACTIVE POWER (kvar)
” flashes. If the board is supplied with the power measurement
option and if the displays “V” and “A” are showing the active power and the power factor
(POWER DISPLAY F
UNCTION), the display “MULTIFUNCTION” shows the reactive
power (in this case, the measure could blink if at least one of the current measure circuits
of the board is saturated, that means that the current is higher than the TA nominal value).
“BATTERY VOLTAGE (V) / APPARENT POWER (kVA)”: when this function is selected,
the display “MULTIFUNCTION” indicates the voltage measured on the battery
(terminals 47-48 or 49-48) (in Volts with a decimal). If POWER DISPLAY FUNCTION is
active, the display indicates the apparent power (in this case, the measure could blink if
at least one of the current measure circuits of the board is saturated, that means that
the current is higher than the TA nominal value).
